Combined plump-bob, level, &amp;c.



No. 707,5!8. Patented Aug. I9, |902.

D. L. McDERMUTT.

COMBINED PLUMB BOB, LEVEL, &c.

(Application tiled May 17, 1901.)

(No Model.)

3o they may be changed or varied at will with- ]WVBU STAIES DAVID L. MCDERMOTT, OF CARLISLE,

PENNSYLVANIA, ASSIGNOR OF ONE- COMBINED PLUME-BOB, LEVEL, Sto.

SPECIFICATION forming part of Letters Patent No. 707,518, dated August 19, 1902.

Application filed May 17. 1901.

To @ZZ wha/1t 'mr/,y concern.:

Be it known that I, DAVID L. MoDnRMo'rfr, a citizen of the United States, residing at Oarlisle, in the county of Cumberland and State 5 of Pennsylvania, haveinvented certain new and useful Improvements in a Combined Plumb-Bob, Level, rbc.; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will Io enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improved combined plumb-bob, gage, and level.

It is adapted for the use more especially of carpenters, cabinet makers, stonemasons, bricklayers, bridge-builders, railroad-track constructors, as well as others.

It is capable of application under all cirou instances by one person without assistance.

It consists of the combination and arrangement of parts, substantially as hereinafter more fully disclosed, and specifically pointed out by the claim.

In the accompanying' drawings, illustrating the preferred embodiment of my invention, Figure l is a face view. Fig. 2 is a reverse view, with the device as arranged for use as a plumb rod or bob. Fig. 3 is a plan view.

Latitude is allowed herein as to details, as

out departing from the spirit of my invention and the same yet remain intact and be protected.

In carrying out my invention I suitably provide a board l--say five feet long and the requisite thickness, dre-with its lower edge cut away or reduced, as at l, at the ends,

thus adapting it as a railway-track gage, the

use ofwhich will be readily appreciated. The

4o face of the board or instrument has applied thereto at its ends preferably metal or brass strips 2 2, with graduations or indicia thereon in inches and fractions thereof. About centrally of the face or front side of said board is pivoted a bar or straight-edge 3, the pivot being passed through said bar or straightedge and into said board. In the upper side or surface of said bar or straight-edge is provided a recess to permit the Aseating therein 5o of a spirit-level 4i of any suitable character to determine the point of the leveling of said straight-edge as it may be moved upon its Serial No. 60,722. (No model.)

pivot-am for instance, when the board or instrument maybe placed-upon a sloping or inclined surface. Arranged upon the reverse 5 5 side of said board is a plumb pendulum or bob 5, comprising a rod pivoted near its upper end, as at 5, to said board, with said end playing in front of a spirit-level 6, let into said board. Said rod or pendulum is suit- 6o ably confined or limited against displacement in the indiscriminate handling of the instrument by a keeper 6, secured to the board 1.

As thus constructed when using the instrument, for instance, on an incline the straiglitedge will move upon its pivot. It moving downward at, say, '7 on the face of the instrument one-fourth inch from a longitudinal central line and at S thereon to the same extent in the opposite direction the fall or dec- 7o lination toward the side next to 7 Will accordingly be indicated, being one-half inch, and so on. In using the instrument as a plumbbob it is simply disposed to stand upon the requisite end, as will be readily appreciated, for that purpose, with its reverse side of course facing or presented toward the operator or workman.

Having thus fully described my invention, what I claim, and desire to secure by Letters 8o Patent, is

As a new article of manufacture, a combined plumb-bob, level, dac., consisting of a rectangular piece or board having notched lower corner edges, and, ranging in substantially vertical alinement with said notched corner edges, indicia or graduations in inches duc., a centrally-pivoted straight-edge or bar, with its upper edge provided with a spiritlevel, and near the end adapted to register or 9o play over said indicia or graduations, said board or piece having upon its opposite surface a pivoted plumb pendulum or rod arranged to operate in the direction of the length of said board, with its normally upper end working in connection with a spirit-level, and a keeper for the retention of said plumb pendulum or rod, substantially as set forth. In testimony whereof I affix my signature in presence of two witnesses.

ADAVID L. MCDERMOTT. Witnesses:

JOHN R. MILLER, W. I-I. SNOW. 

